Chromium removal from drinking water by redox-assisted coagulation: Chemical versus electrocoagulation
| Autor: | Gerardo Buelna, María de Lourdes Rivera-Huerta, Sara Pérez-Castrejón, Sofía Esperanza Garrido-Hoyos, Iván Emmanuel Villegas-Mendoza, Silvia Lucila Gelover-Santiago, Alejandra Martín-Domínguez, Patrick Drogui |
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| Rok vydání: | 2018 |
| Předmět: |
Flocculation
genetic structures Chemistry Sedimentation (water treatment) medicine.medical_treatment chemistry.chemical_element Filtration and Separation 02 engineering and technology 010501 environmental sciences Contamination 021001 nanoscience & nanotechnology Total dissolved solids 01 natural sciences Redox Electrocoagulation Analytical Chemistry Chromium Environmental chemistry medicine Coagulation (water treatment) 0210 nano-technology 0105 earth and related environmental sciences |
| Zdroj: | Separation and Purification Technology. 200:266-272 |
| ISSN: | 1383-5866 |
| DOI: | 10.1016/j.seppur.2018.02.014 |
| Popis: | Chemical Coagulation (CC) and Electrocoagulation (EC) processes using iron as coagulating agent were compared while treating aquifer water contaminated by a relatively high concentration of total chromium (CrT = 19.0 mg L−1). A continuous semi-pilot comprising of EC (or CC), followed by flocculation, sedimentation and sand-filtration steps was used to remove CrT from water in order to get drinking water. A ratio of Fe/CrT ≥ 3 was required to reach the best efficiency of treatment using EC and CC. More than 99% of CrT was removed and residual CrT concentration below 0.05 mg L−1 (the limiting value recommended by WHO) could be obtained using the both configurations. However, CC increased the concentration of dissolved solids above the guideline recommended for drinking water. |
| Databáze: | OpenAIRE |
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